braindrizzlestudio / bdastrocalc Goto Github PK
View Code? Open in Web Editor NEWBDAstroCalc is a Swift struct for low-precision calculations related to Earth's sun and moon.
BDAstroCalc is a Swift struct for low-precision calculations related to Earth's sun and moon.
Hi,
can you add support for swift package manager?
thank
Results are off for at least some locations in the southern hemisphere.
Any chance this can be updated for Swift 4.x?
Thanks!
Hi,
i've write this function for calculate the moon tilt illusion angle, according to this document: http://master.grad.hr/hdgg/kog_stranica/kog18/06myers-KoG18.pdf
static func moonTilt (date: NSDate, location: CLLocationCoordinate2D) -> (alfa: Double, beta: Double, diff: Double) {
let moonAltitude = moonPosition(date: date, location: location).altitude
let moonAzimuth = moonPosition(date: date, location: location).azimuth
let sunAltitude = sunPosition(date: date, location: location).altitude
let sunAzimuth = sunPosition(date: date, location: location).azimuth
let absAzimMoonSun = abs(sunAzimuth - moonAzimuth)
let tanAlfa = ((cos(moonAltitude) * tan(sunAltitude)) - (sin(moonAltitude) * cos(absAzimMoonSun))) / sin(absAzimMoonSun)
let tanBeta = (sin(moonAltitude) - sin(sunAltitude)) / (cos(sunAltitude) * sin(absAzimMoonSun))
var diff = 0.0
if (absAzimMoonSun * radiansToDegrees) <= 180 {
diff = atan(-tanBeta)
} else {
diff = atan(tanAlfa)
}
return (tanAlfa, -tanBeta, diff)
}
I use this code to rotate an image of the moon, but it presents a constant error when compared to sites like: https://www.timeanddate.com/astronomy/italy/turin
or
https://www.mooncalc.org/#/45.3502,7.744,13/2018.09.05/09:26/99/0
Can someone tell me what's wrong?
A declarative, efficient, and flexible JavaScript library for building user interfaces.
๐ Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
An Open Source Machine Learning Framework for Everyone
The Web framework for perfectionists with deadlines.
A PHP framework for web artisans
Bring data to life with SVG, Canvas and HTML. ๐๐๐
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Some thing interesting about visualization, use data art
Some thing interesting about game, make everyone happy.
We are working to build community through open source technology. NB: members must have two-factor auth.
Open source projects and samples from Microsoft.
Google โค๏ธ Open Source for everyone.
Alibaba Open Source for everyone
Data-Driven Documents codes.
China tencent open source team.